drm/i915: Fix CRT hotplug regression in 2.6.35-rc1

[net-next-2.6.git] / drivers / gpu / drm / i915 / i915_irq.c

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 70e1e4b6674467c69ae1fd8b0e69c68c8688f314..d676e55eb212561c7464a13898927b90d577b500 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1434,8 +1434,18 @@ int i915_driver_irq_postinstall(struct drm_device *dev)
                        hotplug_en |= SDVOC_HOTPLUG_INT_EN;
                if (dev_priv->hotplug_supported_mask & SDVOB_HOTPLUG_INT_STATUS)
                        hotplug_en |= SDVOB_HOTPLUG_INT_EN;
-               if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS)
+               if (dev_priv->hotplug_supported_mask & CRT_HOTPLUG_INT_STATUS) {
                        hotplug_en |= CRT_HOTPLUG_INT_EN;
+
+                       /* Programming the CRT detection parameters tends
+                          to generate a spurious hotplug event about three
+                          seconds later.  So just do it once.
+                       */
+                       if (IS_G4X(dev))
+                               hotplug_en |= CRT_HOTPLUG_ACTIVATION_PERIOD_64;
+                       hotplug_en |= CRT_HOTPLUG_VOLTAGE_COMPARE_50;
+               }
+
                /* Ignore TV since it's buggy */
 
                I915_WRITE(PORT_HOTPLUG_EN, hotplug_en);